These are the Naples-Caserta and Naples-Salerno (all these services use the Passante rapid transit railway, of which the latter two start from Campi Flegrei station).
The construction of the line, part of the ″direttissima″ Rome–Naples, was begun in 1911 and after a suspension during World War I, it was completed in 1925 between Pozzuoli and Piazza Garibaldi, electrified with third rail.
Two years later the ″direttissima″ was completed, and the electrical rail service was extended towards Villa Literno and San Giovanni-Barra.
However, in November 2005, operation of line 2 was transferred back to Trenitalia, and that company sold its Metronapoli shares to the municipal government.
[9] Line 2 also uses ALe 582 and the newest double-decker Treno ad alta frequentazione and Jazz trains.